"use strict";
// let strt: string = "ruiky";
// alert(strt);
// strt = 520;
//1.字符串类型
var aName = "貂蝉";
//2.数值类型
var dAge = 18;
dAge = 18.12;
dAge = -18.12;
//3.true/false
var isSingleDog = true;
isSingleDog = false;
// isSingleDog = 1; 在js里我们1==true 而ts不可以
//4.undefined和null
var undef = undefined;
var dnul = null;
